How to query Work Item links with specified comment using WIQL - tfs

Question

I need a fast way to get a list of links filtered by the link comment.
Have a code:
var linkCommentFilter = "Some link comment";
const string queryString = #"SELECT [System.Id]
FROM workItemlinks
WHERE [System.Links.LinkType] = 'Tested By'
AND [System.Links.Comment] = '{0}'
AND ([Source].[System.Id] IN ({1}))";
var query = new Query(store, string.Format(queryString,
linkCommentFilter,
string.Join(",", wiIds)));
var result = query.RunLinkQuery().ToArray();
When trying to run this code an exception occurred "field System.Links.Comment doesn't exist". How could I fix it?

Answer 1

You can't query Work Item links with specified comment using WIQL as there is no System.Links.Comment field in TFS.
You need to use TFS rest api to get a list of work items with links and attachments, check the sample code below:
public List<WorkItem> GetWorkItemsWithLinksAndAttachments()
{
int[] workitemIds = new int[] { 1, 5, 6, 10, 22, 50 };
VssConnection connection = Context.Connection;
WorkItemTrackingHttpClient workItemTrackingClient = connection.GetClient<WorkItemTrackingHttpClient>();
List<WorkItem> workitems = workItemTrackingClient.GetWorkItemsAsync(workitemIds, expand: WorkItemExpand.Links | WorkItemExpand.Relations).Result;
foreach(var workitem in workitems)
{
Console.WriteLine("Work item {0}", workitem.Id);
foreach (var relation in workitem.Relations)
{
Console.WriteLine(" {0} {1}", relation.Rel, relation.Url);
}
}
Then find the specified comment with relation.Attributes["comment"] in workitem.Relations.